Signup for the $100 per child tax refund begins today with payments made by August. Scott Walker signed a bill last month that will allow parents to sign up for a one time $100 per child tax. Families can receive the credit for dependent children who are younger than 18 as of December 31st 2017 and are both Wisconsin and US Citizens. Parents have until July 2nd to sign up for the tax rebate on the State Department of Revenues website. Checks are to be delivered by August.